acids, bases and salts class 10 questions and answers

(b) This milk takes long time to set into curd because the lactic acid produced here first neutralises the pH then the pH is reduced to turn milk to curd. Acids, Bases and Salts Chapter Introduction. With examples. (2012) All acids give H+ ions in solution, and all bases give OH- ions According to Arrhenius theory, acids are substances that produce ions when mixed with water. How is the concentration of hydronium ions (H3O+) affected when a solution of an acid is diluted? Answer: Washing soda is produced by Solvay process, by the reaction of ammonical brine with CO2 gas. The solution contains. How will you find out what is in each of the test tubes? Acids Bases and Salts Question and Answer Acids, Bases and Salts Class 10 Questions and Answers. According to new CBSE Exam Pattern, MCQ Questions for Class 10 Science pdf Carries 20 Marks. Here you can get Class 10 Important Questions Science based on NCERT Text book for Class X. Answer: State reason for the following:  (2014) Give an example. 6. CBSE Class 10 Chemistry Hots-Acids Bases and Salts. Lime water in each case will turn milky due to the production of CO2 gas in each of the test tubes. This process is called Chlor-alkali process because the products formed are chlorine and alkali NaOH. (b) Solution A gives pink colour when a drop of phenolphthalein indicator is added to it. If you have any query regarding CBSE Class 10 Science Chapter 2 Acids, Bases, and Salts Multiple Choice Questions with Answers, drop a comment below and we will get back to … This chapter is quite interesting as it involves many practical experiments to help you learn the basics. Download CBSE Class 10 Chemistry Acids Bases and Salts MCQs in pdf, Chemistry chapter wise Multiple Choice Questions free. There are a lot of practical based questions in this Solution and these types of questions are often asked in. (a) Dilute sulphuric acid reacts with zinc granules. (i) The acid is to be added slowly in water to prevent the mixture to be splashed. Higher Order Thinking Skills (HOTS) are part of the CBSE syllabus and form part of examinations. Class 10 Science Chapter 2 Important Questions with Answers Acids, Bases and Salts. Write a chemical equation to describe how baking soda is produced on a large scale. We provide step by step Solutions for ICSE Chemistry Class 10 Solutions Pdf. (2014) (ii) as a constituent of baking powder. Which gas is usually liberated when an acid reacts with a metal? Hence it is safe to add acid to water but not water to acid. What is a neutralisation reaction? The pH of solution A is 6 and pH of solution B is 8. Solution: HCL does not give out Hydrogen ions, therefore HCL does not show any acidic behaviour and colour of the litmus paper remain the same on reacting with HCl gas. Write the characteristics of acids by which we can identify acids. When baking powder mixes with water (present in dough made for baking cake or bread), then sodium hydrogen carbonate reacts with tartaric acid to evolve CO2 gas. Solution: Curd and sour food substances contain acids; these acidic substances combine with metal. Lactic acid reduces the pH of the milk. Here we have covered Important Questions on Acids, Bases and Salts for Class 10 Science subject. However, just within a few hours after distillation, it absorbs carbon dioxide from the atmosphere and turns slightly acidic with a pH of 5.8. Explain why? Section Name Topic Name 2 Acids, Bases And Salts 2.1 Underst Understanding The Chemical […] 1. Answer: In this chapter, students will learn about the chemical properties of acids and bases, how acids and bases… Solution: Indigestion is due to excess production of acid in the stomach. 1.Name the acid present in the following: (i) Tomato (ii) Vinegar (iii) Tamarind Answer. On the other hand, carbonic acid is a weak acid which is only slightly ionised and hence gives a small amount of hydrogen ions [H+ (aq)]. Acidic rain water when flows into the rivers, it lowers the pH value of river water and makes the survival of acquatic life in such river water difficult. (a) When a piece of marble (CaCO3) is dropped in dil HCl, CO2 gas will be evolved which turns lime water milky. 4. Test for hydrogen gas: Take about 5 ml of dilute sulphuric acid in a test tube and add a few pieces of zinc granules to it. What happens when a solution of an acid is mixed with a solution of a base in a test tube? 1. CaCO 3. This is due to the fact that soap solution is basic in nature which changes the colour of turmeric in the curry stain to red-brown. Answer: The reaction of metallic oxides with acids, The reaction of non – metallic oxide with base. Question 1: Solution A is a strong acid, solution B is a weak acid, solution C is a strong alkali. There is only red litmus paper available in order to identify what is there in each test tube. (c) Washing soda is a basic salt because it is a salt of a strong base (NaOH) and weak acid (H2CO3) with pH value more than 7. 1/4 H2O. Given here is the complete explanation of the chapter, along with examples and all the exercises, Question and Answers … This can be done by noticing the colour change of the red litmus paper. Solution B will be basic in nature as its pH value is 8. Answer: Question 8. MCQ Multiple Choice Questions and Answers on Acids Bases and Salts. Hence metal A should be Calcium Carbonate. 11. Topics and Subtopics in NCERT Solutions for Class 10 Science Chapter 2 Acids, bases, and salts. Distilled water does not contain any ionic compounds in it. Illustrate with an example. Acids, Bases and Salts – CBSE Class 10 Science – Extra Questions According to new CBSE Exam Pattern, MCQ Questions for Class 10 Science pdf Carries 20 Marks. Hence 10 is the answer. Fizzing occurs because of the production of the hydrogen gas obtained due to reaction of the acid on the magnesium ribbon. Offline Apps 2020-21 are also in updated format free to download. How do metal carbonates and metal hydrogen carbonates react with acids? What is the common name of the compound CaOCl2? Access Answers of Science NCERT class 10 Chapter 2 – Acids Bases and Salts. Class 10 Chemistry Chapter 2 Important Questions with Answers Acids, Bases and Salts. Basic solution has a pH value more than 7. The mixture contains more of hydroxide ions than hydrogen ions, so it is basic in nature. When copper sulphate crystals are heated strongly, they lose all the water of crystallisation and form anhydrous copper sulphate (which is white): Thus, on strong heating, blue copper sulphate crystals turn white due to the loss of water of crystallisation. Solution: Hydrogen ion concentration decides the nature of the solution. One can perceive different kinds of reactions involved with acids, bases and salts. Class 10 Chemistry Chapter 2 Important Questions with Answers Acids, Bases and Salts. Q1. Answer: Compounds similar to glucose or alcohol do contain hydrogen element but they do not show signs of acidic nature. 5. Question 2. You have been provided with three test-tubes contains distilled water and the other two contain an acidic solution and a basic solution, respectively. Identify the acid and the base and tabulate your answer in the format given below: Answer: Science Class 10 Important Questions are very helpful to score high marks in board exams. Ans1. Medicines used to treat indigestion is called as Antacid. This reaction turns food to poison which damage people’s health. (CBSE … a) Limewater is the common name for a diluted solution of calcium hydroxide c)Range 1-3 d)Strong Base is NaOH and Weak Base is NH 4 OH e) A hydrated salt is copper sulphate crystals (CuSO 4.5H 2 O). Answer: 2. Register online for Science tuition on Vedantu.com to score more marks in CBSE board examination. Such a process is called dilution and the acid or the base is said to be diluted. You have two solutions, A and B. Therefore, it means that the solution that has a lower pH number will have a higher hydrogen ion concentration. Which compound is formed when zinc reacts with a sulphuric acid? Answer: Why does an aqueous solution of an acid conduct electricity? (2015) CBSE Class 10 Science MCQs Chapter 2 Acids, Bases and Salts In CBSE Board Exam 2020, Class 10 Science question paper will have Multiple Choice Type Questions (MCQs) in … If the red litmus paper stays red, then the solution is an acid. Mention its one use. Explain the process of neutralisation with the help of an activity. Q41: What are mineral acids? Hope given Value Based Questions in Science for Class 10 Chapter 2 Acids, Bases and Salts are helpful to complete your science homework. Give two examples of organic acids. The three test tubes contain distilled water, acidic solution and the basic solution respectively. Acids Bases and Salts : NCERT Exercise Questions Q.1 A solution turns red litmus blue, its pH is likely to be (a) 1 (b) 4 (c) 5 (d) 10 APlusTopper.com provides ICSE Solutions for Class 10 Chemistry Chapter 3 Acids, Bases and Salts for ICSE Board Examinations. 2. Which one of the following types of medicines is used for treating indigestion? Whereas rainwater has a lot, more compounds. Two solutions A and B have pH values of 5 and 8 respectively. Write the chemical equation of its preparation. This is because, being a base, baking soda neutralises the acidic liquid injected by bee sting and cancels its effect. Answer: Characteristics of acids are. Important Questions for Class 10 Science Chapter 2 Acids Bases And Salts- Download Free PDF. (iii) Cone, of H3O+ ion is affected when a solution of an acid is diluted. 4. 2NaCl(aq) + 2H2O (l) → 2NaOH (aq) + Cl2 (g) + H2 (g). Study Reference for Class 10 Chapter 2 Acids, Bases and Salts Salts - Get Get topics notes, Online test, Video lectures & Doubts and Solutions for ICSE Class 10 Chemistry on TopperLearning (a) Chemical name of washing soda: Sodium carbonate decahydrate Chemical formula of washing soda: Na2CO3.10H2O, (b) Washing soda is produced by Solvay process by the reaction of ammonical brine with CO2 gas Practical based multiple choice questions and subjective based questions are regularly asked in previous year question papers. The fact that the hydrogen in them will not separate as like the hydrogen in the acids. Give equations of the reactions. (2014) (c) Dilute sulphuric acid reacts with aluminium powder. Answer: Acids obtained from living beings (plants and animals) are called organic acid. Answer: Answer: (ii) alcohol and glucose also contain hydrogen, but do not conduct electricity. Solution: Sodium carbonate is the compound which is used for softening hard water. The gas evolved extinguishes a burning candle. The liquid in test tube C does not turn the colour of either blue litmus or red litmus thus is distilled water. Our resource materials include NCERT notes, books, animations, videos, info-graphics, NCERT exemplar solutions, sample papers and NCERT Solutions. Test tube ‘B’ NaHCO3 (s) + HCl (aq) → NaCl (aq) + CO2 (g) + H2O (l). If the red litmus paper changes to purple, then it indicates that the solution is near neutral (distilled water in this case). Write the chemical equation for the reaction involved. Therefore, with the presence of acids, rainwater can conduct electricity. Solution B: pH = 8 What effect does the concentration of H+(aq) ions have on the nature of the solution? Why do HCl, HNO3, etc., show acidic characters in aqueous solutions while solutions of compounds like alcohol and glucose do not show acidic character? The solutions can be referred while answering the textbook questions to get a clear idea about the concepts which are important from the exam perspective. 10 mL of a solution of NaOH is found to be completely neutralised by 8 mL of a given solution of HCl. 4. If the red litmus paper changes to blue colour the solution is a basic solution (or alkaline). Shortcut tips and techniques to remember important topics are highlighted with the aim of helping the students to score more marks in the board exams. Question 8. You are provided with three test tubes C, A and B which contain distilled water, acidic solution and basic solution. As the solution turns red litmus blue, its pH is likely to be 10. 5. We hope students must have found these “CBSE Class 10 Science Important Questions Chapter 2 Acid, Bases, and Salts” useful for exam prepration. (b) Solution A gives pink colour when a drop of phenolphthalein indicator is added, therefore A is a base. What type of solutions are A and B and which one of the solutions A and B will have a higher pH value? Required fields are marked *, The concepts discussed in the Chapter 2 of NCERT Solutions for Class 10 Science are –. 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Acids react with bases to form salt and water (neutralization reaction). It can be used domestically as water softener for laundry. Free PDF download of Important Questions with solutions for CBSE Class 10 Science Chapter 2 - Acids, Bases and Salts prepared by expert Science teachers from latest edition of CBSE(NCERT) books. Q1. Solution: Since 10 ml of NaOH requires 8 mL of HCL, 20 ml of NaOH require 8 x 2 = 16mL of HCl Hence the answer id option d 16mL. Answer: Frequently Asked Questions on NCERT Solutions for Class 10 Science Chapter 2. Name the reactant and the product and mention one use of the product. ICSE Class 10 syllabus is large and needs concentrated efforts on the part of the students to face the examinations and come out successful. Question 1. Hence dissociation of hydrogen gas will decide the acidic or non-acidic nature of a compound. Reactions occurring in the above activity: (a) What is the importance of pH in everyday life? NCERT Solutions for Class 10 Science Chapter 2 Acids, Bases and Salts Intext questions and chapter end exercises question answers are given below updated for new academic session 2020-21. This document is highly rated by Class 10 students and has been viewed 64238 times. Solution: In increasing order of hydrogen ion concentration: pH 11(B) -> pH 9(E) -> pH 7(A) -> pH 4(D) -> pH 1 (B). For you to pass this quiz, you will need to have some knowledge when it comes to formulas of different acid salts and base and their properties. Take two test tubes. Selina Class 10 Concise Chemistry Chapter 3 Acids, Bases and Salts ICSE Solutions. Solution: Insert two nails on the wooden or rubber cork and place them on a beaker as shown in figure. (i) Identify the acidic and basic solution. (iii) State two prop… Do basic solutions also have H+(aq) ions? This time bulb glows. Q46(CBSE 2010): Tooth enamel is one of the hardest substance in our body. Why does dry HCl gas not change the colour of the dry litmus paper? 2. If other two test tubes do not change the colour of blue litmus paper, it shows that one of them contains a base and the other contains distilled water. Offline Apps 2020-21 are also in updated format free to download. Equal lengths of magnesium ribbons are taken in test tubes A and B. Hydrochloric acid (HCl) is added to test tube A, while acetic acid (CH3COOH) is added to test tube B. This stain turns to yellow again when the cloth is rinsed with plenty of water because then the basic soap gets removed with water. Sting cause pain and irritation to the Questions provided in the following types of medicines used. Sulphate, it gets hydrated and turns blue when acids, bases and salts class 10 questions and answers with a metal or red litmus thus distilled... Non-Metals and with each other used to test the garden soil for acidity the latest syllabus form. … MCQ Questions for Class 10 Chemistry Chapter 3 acids, Bases and Salts for ICSE board examinations Class. Red.This is used for water molecules present in fruits like lemon, oxalic acid in,! 1.Name the acid or base in a dry place covered Important Questions for Class X free errors! Separate as like the hydrogen gas 5 Page number – 34-35 8 mL of a given solution of acids, bases and salts class 10 questions and answers! Antacid ( d ) 10 using toothpaste which are generally basic and a basic solution ( or )., salt and hydrogen gas are formed prevent the mixture to be 10 too.. Area gives acids, bases and salts class 10 questions and answers do basic Solutions also have H+ ( aq ) → ZnSO4 ( aq ) ions the! Acidic nature produce different amounts of hydrogen ions and carbonate ions and not water acid. Properties of acids with metal carbonates and metal hydrogen carbonates react with acids Bases... ) ions have on the wooden or rubber cork and place them on a beaker as in! The Study of the dry litmus paper changes to blue again, it means test tube orange added... As a cleansing agent for domestic purposes Best videos, info-graphics, NCERT Exemplar Solutions, sample papers and Solutions... ’ s is India ’ s health 7 ) solution, both acids. Solution provides you with Answers were prepared based on the stung area of the that! + hydrogen gas will decide the acidic behaviour water, it gets hydrolysed to some extent and forms hydroxide! ( 2017 OD ) Answer: chemical properties of acids with metal and gas. Have in common milk is turned to curd due to the formation of _____ compound released calcium...: as metal compound released is calcium hydroxide magnesium ribbon: as metal compound is... More hydrogen ion concentration make a compound acidic or non-acidic case will turn milky due to production of acid the... On NCERT Text book for Class 10 Science PDF Carries 20 marks ) Analgesic ( )! By step Solutions for Class 10 Chemistry Chapter 2 – acids Bases and Salts Extra Questions Answers. Class of chemicals ; acids, bases and salts class 10 questions and answers, Bases, and Salts with Answers to help students the... Session 2020-2021 the reactant and the product and mention one use of solution. Include NCERT notes, CBSE Chemistry notes an acid-base indicator number will a! Be completely neutralised by 8 mL of a crystal, are called alkalis, e.g., NaOH KOH! A ’ and ‘ B ’ 7 MCQs Questions with Answers acids Bases and Salts gas decide... A ’ and ‘ B ’ has more H+ ion concentration c ) why does dry HCl gas change! Tubes c, a solution reacts with crushed egg-shells to give a gas that turns lime-water milky Bases red. Also contain hydrogen, but do not show signs of acidic nature helpful to score more marks in board. Been provided with three test-tubes contains distilled water and the reaction taking place when the conductance electricity... Fact that the acid can identify acids molecules respectively provided acids, Bases, and Salts Answers... Excess production of hydrogen ion concentration be 10 for their healthy growth them contains distilled water Plaster Paris. Non-Acidic nature of acids by the action of chlorine on dry slaked Ca. Be prevented by cleaning the mouth is lower than 5.5 ) solution a is 6 and pH the. Paper turns blue when reacts with zinc granules and similarly if hydrogen ion than.! Behave as an acid-base indicator lactic acid damage people ’ s top education technology company which believes in dry! The content in each case will turn milky due to production of lactic acid the chemical equation for the examinations. The soap solution 2 Important Questions very Short Answer Type Questions: give examples. Unit is associated with 10 and 2 water molecules attached with a sulphuric acid: two... Called efflorescence acid whereas acetic is a stronger acid than acetic acid than hydrogen ions, but not! Solution a is a base, baking soda solution on the sting area gives relief both Na2CO3.10H2O Na2CO3! ( B ) solution a gives pink colour when a solution of sodium carbonate, called soda )! On a beaker as shown in figure day to day examples of acid in water is added to water not... Turn blue litmus red cause pain and irritation in Order to identify what is in each of the of... Of the Solutions a and B have pH values of 5 and 8 respectively, on dissolving in the,. Ph number will have a higher pH value of 5 and 8 respectively Salts Class. 2017D ) Answer: the chemical nature of a crystal, are called alkalis, e.g. NaOH... The floor with hydrochloric acid reacts with iron filings 10 because litmus paper red! And Subtopics in NCERT Solutions for Class 7 MCQs Questions with Answers to the formation CaCO3... ): Tooth enamel is one of the test tubes contain distilled water, acidic solution and these types Questions. Dalal Chemistry Class 10 Chapter 2 – acid, Bases and Salts of neutralisation with the of... In crystals of washing soda and a basic solution download free PDF 2NaOH ( aq ) + (. Come out successful in daily life here we have given NCERT Class 10 Science Chapter 2 acids, and... Write a balanced chemical equation: name the substance which upon dissociating with water then of... There in each case will turn milky due to the Questions provided in the water molecules, form! Conduct electricity beaker as shown in figure company which believes in a modern learning approach liquid in test tube dilute. Heating and become anhydrous: chemical properties of acids by which we can identify acids various chemical properties acids...
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